Reach Barrier 3139 Reflective Air&sup2; Attic Ladder Insulation Kit layers of sealed air laminated between layers of reflective polyethylene Reflective Air retains its air much longer than competing brands Blocks up to 95-Percent of radiant heat by slowing the movement of convection and conductive heats Fits most sizes of attic ladders 20-Percent recycled material and made in America